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REVERBERATOR-Y FURNACE.

Inventor.

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Patented Now-2.0, 1888.

wwmmvwmm suitable form; 6, the hearth; f, the chimney- UNITED STATES PATENT Erica,

MICHAEL MARTIN BAIR, OF PARIS, FRANCE.

REVERBERATORY FURNACE.

SPECIFICATION forming partof Letters Patent No. 393,091, dated November 20, 1888.

Application filed July 3, 1886. Serial No. 207,034. (X0 model.)

Patented in France May 25, 1886, No. 176,357; in England May 28, 1886, No. 7.202; in Belgium May 29, 1886, No. 73,295, and in Germany June 5, 1886, No. 40,315.

To all whom it may concern:

Be it known that I, MronAnr. MARTIN Barn, of the city of Paris, France, have invented new and useful Improvements in Reverberatory Furnaces, (for which I have obtained Letters Patentas follows: in France, May25, 1886, No. 176,357; in Belgium, May 29, 1886, No. 73,295; in Germany, June 5, 1886, No. 40,315, and in England, May 28, 1886, No. 7,202,) of which the following is a full,clear, and exact description of said invention, such as will enable others skilled in the art to which it appertains to ap ply the same.

This invention relates to an improved construction of reverberatory furnaces, whereby an elevated and u niform temperature is obtainableat all points of the hearth,upon which the materials to be treated are placed. This resultis obtained by providing the reverberatory furnace,whatever may be its construction,with an inner partition extending from the bridge to the shaft and dividing the furnace-chamber into two distinct parts, the partition being provided with apertures of suitable area and number, which permit of the flames coming into contact with the material under treatment only after complete combustion, and which also serves to distribute the flames uniformly over the whole area of the hearth. A twofold result is thus obtained not hitherto obtainable in reverberatory furnaces as heretofore constructed, in which the flame, after passing over the bridge, is deflected by the furnacearch directly into the hearth.

Reference is to be had to the accompanying drawings, forming part of this specification, which represents an example of a reverberatory furnace constructed according to this invention.

Figure 1 is a longitudinal vertical section of the furnace; and Figs. 2 and 3 transverse section of the same taken on lines 1 2 and 3 4 of Fig. 1, respectively.

The same letters of reference represent the same parts in all the figures.

a is the furnace-setting; b, the grate; c, the fire-bridge; d,- the arch, which may be of any shaft; and k,a flue connecting the fire-chamber directly with the chimney-shaft. Between the bridge 0 and the base of the chimney f extends a partition, 9, with apertures 71., which divides the furnace into two distinct chambers, the upper one, A, receiving the flame from the furnace,while the other, 13, is that in which the materials to be treated are placed upon the hearth. The flame in traversing the openings h in partition 9 undergoes complete combustion before coming in contact with the matters under treatment, and as the whole of the flame is distributed uniformly over the whole surface of the partition 9 the furnace-hearth will be uniformly heated. Moreover,the flames in traversing the partition 9 raise itto a high temperature, so as to constitute this partition an accumulator of heat having an efficiency proportional to its mass.

A reverberatory furnace constructed in this manner can be employed for heating materials out of contact with air. For this purposeimlnediatel y the furnace has attained the desired temperature it is only necessary to introduce the materials to be heated or melted and to close the dampers i i,placed at different points of thc.furnace, as indicated in dotted lines. One of these dampers i is placed between the combustion-chamber and the hearth, and another at the end of the hearth at the entrance of the exit-flue, and still another may be placed in the stack itself. The furnace-chamber is thus completely closed and forms a kind of muffle heated by the heat stored in partition {1 and radiated therefrom. 'While the furnace is thus closed the gases of combustion may be directed by means of suitable dampers and flues around the hearth and directly into the chimney-shaft f. 7 Employed in this manner,

The furnace represented in the drawings merely serves to illustrate the principle on which the invention is based, and it may be otherwise arranged both as regards the form and dimensions,the number, form, and dimensions of the openings in the diaphragm g, and the material of which said diaphragm is constructed. It may be constructed of a number of small independent arches, between which the flame would pass.

I am aware of the United States patents, Reissue No. 7,547, granted to W. D. Wood on March 6, 1877; No. 154,334, granted to Caleb Marshall on August 25, 1874; No. 73,838, granted to L. E. Rivot on January 29, 1868, No. 259,475, granted to WV. T. Browne on June 13, 1882, and British Patent No. 841 of 1875; and I hereby disclaim the construction of furnaces therein shown and described, for the reason that none of them has aperforated partition extending from the bridge to the base of the chimney, nor dampers in connection with such construction,whereby the bed, which forms a part of the passage which is traversed by the heat as it passes to the stack is closed up with the said perforated partition within the inclosure,whereby the heat stored therein is utilized in the treatment of the ore or other material on the bed. Consequently none of the furnaces described in these patents has the construction nor obtains the elevated bridge-wall to the stack and divides the fur-- nace into an upper flame-chamber and a lower heating or melting chamber, substantially as and for the purposes specified.

2. In combination with a reverberatory furnace having a perforated partition situate between the hearth and the reverberating arch, P

a damper situate between the fire-chamber and the hearth, and a damper situate between the hearth and the arch, substantially as and for the purposes specified.

The foregoing specification of my improvements in reverberatory furnaces signed by me this 11th day of June, 1886.

MICHAEL MARTIN BAIR.

\Vitnesses:

.RoBT. M. Hoorna, ALBERT MoREAU. 

